32 lines
732 B
Rust
32 lines
732 B
Rust
//@ run-pass
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//@ pretty-expanded FIXME #23616
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#![deny(unused_mut)]
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#![allow(unused_must_use)]
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// Test that mutating a mutable upvar in a capture-by-value unboxed
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// closure does not ice (issue #18238) and marks the upvar as used
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// mutably so we do not get a spurious warning about it not needing to
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// be declared mutable (issue #18336 and #18769)
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fn set(x: &mut usize) { *x = 42; }
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fn main() {
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{
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let mut x = 0_usize;
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move || x += 1; //~ WARN unused variable: `x`
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}
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{
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let mut x = 0_usize;
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move || x += 1; //~ WARN unused variable: `x`
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}
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{
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let mut x = 0_usize;
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move || set(&mut x);
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}
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{
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let mut x = 0_usize;
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move || set(&mut x);
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}
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}
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